M-46 over Black River
Poor Condition79 years old5,462 vehicles/day
Location
| State | Michigan |
| County | Sanilac |
| Location | 5.6 Mi E Of M-19 |
| Carries | M-46 |
| Crosses | Black River |
| Coordinates | 43.42499, -82.72181 |
Condition Ratings
| Overall Condition | Poor |
| Deck | 4 (Poor) |
| Superstructure | 4 (Poor) |
| Substructure | 4 (Poor) |
| Channel/Waterway | 4 (Poor) |
| Scour Critical | 3 — Scour critical |
Physical Characteristics
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 74.8 ft (22.8 m) |
| Max Span | 74.8 ft (22.8 m) |
| Deck Width | 43.3 ft (13.2 m) |
| Deck Area | 301.0 sq m |
| Main Spans | 1 |
| Year Built | 1947 |
Traffic
| Avg Daily Traffic | 5,462 (2007) |
| Truck Traffic | 3% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 524 |
| Inspection Frequency | Every 12 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000009478 |